搜题请搜索小程序“爱下问搜题”
问题 解答题
计算，写出计算过程
4
5
×
7
8
÷
7
10
1
2
×
1
6
+
5
12
÷
1
2
1
4
÷(3-
7
13
-
6
13
)
8
9
÷[(
5
6
-
2
3
)÷
1
4
]
1
15
x=
7
20
×
4
7
．
答案

（1）

4
5
×
7
8
÷
7
10

=

4
5
×
7
8
×
10
7

=1；

（2）

1
2
×
1
6
+
5
12
÷
1
2

=

1
12
+
5
12
×2

=

1
12
+
5
6

=

11
12
；

（3）

1
4
÷（3-
7
13
-
6
13
）

=

1
4
÷[3-（
7
13
+
6
13
）]

=

1
4
÷[3-1]

=

1
8
；

（4）

8
9
÷[（
5
6
-
2
3
）÷
1
4
]

=

8
9
÷[
1
6
×4]

=

8
9
÷
2
3

=

8
9
×
3
2

=

4
3
；

（5）

1
15
x=
7
20
×
4
7

1
15
x=
1
5

1
15
x×15=
1
5
×15

x=3．

实验题

请你协助小欣同学填写如下实验报告。

实验目的：探究铜绿的性质实验用品：（略）

实验过程及现象记录：

（1）观察铜绿的颜色和状态等物理性质：铜绿是___________色固体；

（2）将铜绿粉末用__________分别加到两支试管中；

（3）用__________向一支试管中逐滴滴加稀盐酸，观察到铜绿溶解，溶液呈___________色，同时有大量气泡产生；

（4）将另一支试管在酒精灯的外焰上加热（注意：加热时要先均匀加热后再集中加热），一段时间后，观察到绿色粉末逐渐变成__________色，试管口有水滴滴出。

结论：铜绿具有的化学性质是（Ⅰ）____________ ；（Ⅱ）_______________ 。

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完形填空
完形填空。
     My husband has been ill in hospital for two months and I have learned to make do with very little (凑合过
日子).
     One Sunday afternoon, I went to buy a   1   for my daughter with my friend. A woman who was also
buying books in the bookstore saw me and said, "I   2   you must be having a hard time." I just smiled and
said, "I'm okay. I have eight dollars and I have food at home, so I'll be   3   ."
      About ten   4   later she came up to me and said,"Can I take a look at the book that you've   5   ? It seems
very interesting!" I said all right and gave it to her.
      Just then   6   called me and I immediately went out.   7   I returned she thanked me and   8   my book.
     On my way home my friend who was driving said, "You told me you didn't had much   9   ?" I replied,"I
don't."
      She said, "Oh yes, you do!" I assured (向—保证) her I   10   had two dollars left, but still she insisted I 
  11   plenty of money.
      "Look at your book in your bag," she   12   ."There's a hundred dollar bill in it." I turned over the page and
got so   13   ! There actually was a hundred dollar   14   that seemed to have fallen out of my book!
     I   15   her, very surprised, and said, "I don't know   16   that came from. I have no idea because I certainly
did not have a hundred   17   !"
     I thought and thought about the money for days after that. Then I realized it must have come from   18   
who asked to borrow my book in the bookstore. How   19   of her! And what a wonderful gift to   20   when
I am down to my last two dollars!
( )1. A. storybook  
( )2. A. suggest   
( )3. A. sad        
( )4. A. hours     
( )5. A. written    
( )6. A. someone   
( )7. A. Since    
( )8.A. threw away 
( )9. A. wisdom    
( )10. A. never    
( )11. A. had      
( )12. A. said    
( )13. A. worried   
( )14. A. letter   
( )15. A. looked at 
( )16. A. why      
( )17. A. bags     
( )18. A. the lady  
( )19. A. foolish   
( )20. A. make   		B. toy bear   
B. wish       
B. upset     
B. minutes  
B. chosen    
B. nobody   
B. When    
B. asked for  
B. money     
B. always   
B. spent    
B. cried    
B. satisfied  
B. card      
B. quarreled  with  
B. how       
B. books     
B. the writer 
B. kind       
B. refuse  		C. birthday cake    
C. hear               
C. fine               
C. days           
C. hidden               
C. everyone       
C. Before                
C. looked into    
C. water              
C. only               
C. lost               
C. ordered                    
C. surprised    
C. picture                
C. believed in     
C. what            
C. stores             
C. my friend         
C. energetic       
C. invent            		D. concert ticket             
D. think                      
D. honest                     
D. weeks                      
D. finished                   
D. anybody                    
D. Because                     
D. gave back                 
D. patience                  
D. once                      
D. won                       
D. shouted                   
D. relaxed                    
D. bill                      
D. laughed at               
D. where                     
D. dollars                    
D. my daughter              
D. proud                     
D. receive               
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